640310 has 16 divisors (see below), whose sum is σ = 1257552. Its totient is φ = 232800.

The previous prime is 640307. The next prime is 640333. The reversal of 640310 is 13046.

640310 is nontrivially palindromic in base 4.

640310 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×640310² = 819993792200, which contains 22 as substring.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 640310.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2801 + ... + 3020.

It is an arithmetic number, because the mean of its divisors is an integer number (78597).

2⁶⁴⁰³¹⁰ is an apocalyptic number.

640310 is a deficient number, since it is larger than the sum of its proper divisors (617242).

640310 is a wasteful number, since it uses less digits than its factorization.

640310 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5839.

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 640310 is about 800.1937265438. The cubic root of 640310 is about 86.1912994127.

Adding to 640310 its reverse (13046), we get a palindrome (653356).

Subtracting from 640310 its reverse (13046), we obtain a square (627264 = 792²).

It can be divided in two parts, 6 and 40310, that multiplied together give a triangular number (241860 = T₆₉₅).

The spelling of 640310 in words is "six hundred forty thousand, three hundred ten".